<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
   <div id="app">
    <h3>键盘回车事件</h3>
    <input @keyup.enter="fn" v-model="username" type="text">
   </div> 

   <script src="https://cdn.jsdelivr.net/npm/vue@2.7.16/dist/vue.js"></script>
   <script>
    const app=new Vue({
        el:'#app',
        data:{
            username:""
        },
        methods:{
            fn(e){
                if(e.key==='Enter'){
                    console.log('键盘回车时触发',this.username);
                }
                
            }
        }
    })
   </script>
</body>

</html>